The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/i386/isa/mse.c

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    1 /*
    2  * Copyright 1992 by the University of Guelph
    3  *
    4  * Permission to use, copy and modify this
    5  * software and its documentation for any purpose and without
    6  * fee is hereby granted, provided that the above copyright
    7  * notice appear in all copies and that both that copyright
    8  * notice and this permission notice appear in supporting
    9  * documentation.
   10  * University of Guelph makes no representations about the suitability of
   11  * this software for any purpose.  It is provided "as is"
   12  * without express or implied warranty.
   13  *
   14  * $FreeBSD: releng/5.0/sys/i386/isa/mse.c 93024 2002-03-23 16:01:49Z bde $
   15  */
   16 /*
   17  * Driver for the Logitech and ATI Inport Bus mice for use with 386bsd and
   18  * the X386 port, courtesy of
   19  * Rick Macklem, rick@snowhite.cis.uoguelph.ca
   20  * Caveats: The driver currently uses spltty(), but doesn't use any
   21  * generic tty code. It could use splmse() (that only masks off the
   22  * bus mouse interrupt, but that would require hacking in i386/isa/icu.s.
   23  * (This may be worth the effort, since the Logitech generates 30/60
   24  * interrupts/sec continuously while it is open.)
   25  * NB: The ATI has NOT been tested yet!
   26  */
   27 
   28 /*
   29  * Modification history:
   30  * Sep 6, 1994 -- Lars Fredriksen(fredriks@mcs.com)
   31  *   improved probe based on input from Logitech.
   32  *
   33  * Oct 19, 1992 -- E. Stark (stark@cs.sunysb.edu)
   34  *   fixes to make it work with Microsoft InPort busmouse
   35  *
   36  * Jan, 1993 -- E. Stark (stark@cs.sunysb.edu)
   37  *   added patches for new "select" interface
   38  *
   39  * May 4, 1993 -- E. Stark (stark@cs.sunysb.edu)
   40  *   changed position of some spl()'s in mseread
   41  *
   42  * October 8, 1993 -- E. Stark (stark@cs.sunysb.edu)
   43  *   limit maximum negative x/y value to -127 to work around XFree problem
   44  *   that causes spurious button pushes.
   45  */
   46 
   47 #include <sys/param.h>
   48 #include <sys/systm.h>
   49 #include <sys/conf.h>
   50 #include <sys/kernel.h>
   51 #include <sys/bus.h>
   52 #include <sys/poll.h>
   53 #include <sys/selinfo.h>
   54 #include <sys/uio.h>
   55 #include <sys/mouse.h>
   56 
   57 #include <machine/bus_pio.h>
   58 #include <machine/bus.h>
   59 #include <machine/clock.h>
   60 #include <machine/resource.h>
   61 #include <sys/rman.h>
   62 
   63 #include <isa/isavar.h>
   64 
   65 /* driver configuration flags (config) */
   66 #define MSE_CONFIG_ACCEL        0x00f0  /* acceleration factor */
   67 #define MSE_CONFIG_FLAGS        (MSE_CONFIG_ACCEL)
   68 
   69 /*
   70  * Software control structure for mouse. The sc_enablemouse(),
   71  * sc_disablemouse() and sc_getmouse() routines must be called spl'd().
   72  */
   73 typedef struct mse_softc {
   74         int             sc_flags;
   75         int             sc_mousetype;
   76         struct selinfo  sc_selp;
   77         struct resource *sc_port;
   78         struct resource *sc_intr;
   79         bus_space_tag_t sc_iot;
   80         bus_space_handle_t sc_ioh;
   81         void            *sc_ih;
   82         void            (*sc_enablemouse)(bus_space_tag_t t,
   83                             bus_space_handle_t h);
   84         void            (*sc_disablemouse)(bus_space_tag_t t,
   85                             bus_space_handle_t h);
   86         void            (*sc_getmouse)(bus_space_tag_t t, bus_space_handle_t h,
   87                             int *dx, int *dy, int *but);
   88         int             sc_deltax;
   89         int             sc_deltay;
   90         int             sc_obuttons;
   91         int             sc_buttons;
   92         int             sc_bytesread;
   93         u_char          sc_bytes[MOUSE_SYS_PACKETSIZE];
   94         struct          callout_handle sc_callout;
   95         int             sc_watchdog;
   96         dev_t           sc_dev;
   97         dev_t           sc_ndev;
   98         mousehw_t       hw;
   99         mousemode_t     mode;
  100         mousestatus_t   status;
  101 } mse_softc_t;
  102 
  103 static  devclass_t      mse_devclass;
  104 
  105 static  int             mse_probe(device_t dev);
  106 static  int             mse_attach(device_t dev);
  107 static  int             mse_detach(device_t dev);
  108 
  109 static  device_method_t mse_methods[] = {
  110         DEVMETHOD(device_probe,         mse_probe),
  111         DEVMETHOD(device_attach,        mse_attach),
  112         DEVMETHOD(device_detach,        mse_detach),
  113         { 0, 0 }
  114 };
  115 
  116 static  driver_t        mse_driver = {
  117         "mse",
  118         mse_methods,
  119         sizeof(mse_softc_t),
  120 };
  121 
  122 DRIVER_MODULE(mse, isa, mse_driver, mse_devclass, 0, 0);
  123 
  124 static struct isa_pnp_id mse_ids[] = {
  125         { 0x000fd041, "Bus mouse" },                    /* PNP0F00 */
  126         { 0x020fd041, "InPort mouse" },                 /* PNP0F02 */
  127         { 0x0d0fd041, "InPort mouse compatible" },      /* PNP0F0D */
  128         { 0x110fd041, "Bus mouse compatible" },         /* PNP0F11 */
  129         { 0x150fd041, "Logitech bus mouse" },           /* PNP0F15 */
  130         { 0x180fd041, "Logitech bus mouse compatible" },/* PNP0F18 */
  131         { 0 }
  132 };
  133 
  134 static  d_open_t        mseopen;
  135 static  d_close_t       mseclose;
  136 static  d_read_t        mseread;
  137 static  d_ioctl_t       mseioctl;
  138 static  d_poll_t        msepoll;
  139 
  140 #define CDEV_MAJOR 27
  141 static struct cdevsw mse_cdevsw = {
  142         /* open */      mseopen,
  143         /* close */     mseclose,
  144         /* read */      mseread,
  145         /* write */     nowrite,
  146         /* ioctl */     mseioctl,
  147         /* poll */      msepoll,
  148         /* mmap */      nommap,
  149         /* strategy */  nostrategy,
  150         /* name */      "mse",
  151         /* maj */       CDEV_MAJOR,
  152         /* dump */      nodump,
  153         /* psize */     nopsize,
  154         /* flags */     0,
  155 };
  156 
  157 static  void            mseintr(void *);
  158 static  timeout_t       msetimeout;
  159 
  160 /* Flags */
  161 #define MSESC_OPEN      0x1
  162 #define MSESC_WANT      0x2
  163 
  164 /* and Mouse Types */
  165 #define MSE_NONE        0       /* don't move this! */
  166 #define MSE_LOGITECH    0x1
  167 #define MSE_ATIINPORT   0x2
  168 #define MSE_LOGI_SIG    0xA5
  169 
  170 #define MSE_PORTA       0
  171 #define MSE_PORTB       1
  172 #define MSE_PORTC       2
  173 #define MSE_PORTD       3
  174 #define MSE_IOSIZE      4
  175 
  176 #define MSE_UNIT(dev)           (minor(dev) >> 1)
  177 #define MSE_NBLOCKIO(dev)       (minor(dev) & 0x1)
  178 
  179 /*
  180  * Logitech bus mouse definitions
  181  */
  182 #define MSE_SETUP       0x91    /* What does this mean? */
  183                                 /* The definition for the control port */
  184                                 /* is as follows: */
  185 
  186                                 /* D7    =  Mode set flag (1 = active)  */
  187                                 /* D6,D5 =  Mode selection (port A)     */
  188                                 /*          00 = Mode 0 = Basic I/O     */
  189                                 /*          01 = Mode 1 = Strobed I/O   */
  190                                 /*          10 = Mode 2 = Bi-dir bus    */
  191                                 /* D4    =  Port A direction (1 = input)*/
  192                                 /* D3    =  Port C (upper 4 bits)       */
  193                                 /*          direction. (1 = input)      */
  194                                 /* D2    =  Mode selection (port B & C) */
  195                                 /*          0 = Mode 0 = Basic I/O      */
  196                                 /*          1 = Mode 1 = Strobed I/O    */
  197                                 /* D1    =  Port B direction (1 = input)*/
  198                                 /* D0    =  Port C (lower 4 bits)       */
  199                                 /*          direction. (1 = input)      */
  200 
  201                                 /* So 91 means Basic I/O on all 3 ports,*/
  202                                 /* Port A is an input port, B is an     */
  203                                 /* output port, C is split with upper   */
  204                                 /* 4 bits being an output port and lower*/
  205                                 /* 4 bits an input port, and enable the */
  206                                 /* sucker.                              */
  207                                 /* Courtesy Intel 8255 databook. Lars   */
  208 #define MSE_HOLD        0x80
  209 #define MSE_RXLOW       0x00
  210 #define MSE_RXHIGH      0x20
  211 #define MSE_RYLOW       0x40
  212 #define MSE_RYHIGH      0x60
  213 #define MSE_DISINTR     0x10
  214 #define MSE_INTREN      0x00
  215 
  216 static  int             mse_probelogi(device_t dev, mse_softc_t *sc);
  217 static  void            mse_disablelogi(bus_space_tag_t t,
  218                             bus_space_handle_t h);
  219 static  void            mse_getlogi(bus_space_tag_t t, bus_space_handle_t h,
  220                             int *dx, int *dy, int *but);
  221 static  void            mse_enablelogi(bus_space_tag_t t,
  222                             bus_space_handle_t h);
  223 
  224 /*
  225  * ATI Inport mouse definitions
  226  */
  227 #define MSE_INPORT_RESET        0x80
  228 #define MSE_INPORT_STATUS       0x00
  229 #define MSE_INPORT_DX           0x01
  230 #define MSE_INPORT_DY           0x02
  231 #define MSE_INPORT_MODE         0x07
  232 #define MSE_INPORT_HOLD         0x20
  233 #define MSE_INPORT_INTREN       0x09
  234 
  235 static  int             mse_probeati(device_t dev, mse_softc_t *sc);
  236 static  void            mse_enableati(bus_space_tag_t t, bus_space_handle_t h);
  237 static  void            mse_disableati(bus_space_tag_t t, bus_space_handle_t h);
  238 static  void            mse_getati(bus_space_tag_t t, bus_space_handle_t h,
  239                             int *dx, int *dy, int *but);
  240 
  241 #define MSEPRI  (PZERO + 3)
  242 
  243 /*
  244  * Table of mouse types.
  245  * Keep the Logitech last, since I haven't figured out how to probe it
  246  * properly yet. (Someday I'll have the documentation.)
  247  */
  248 static struct mse_types {
  249         int     m_type;         /* Type of bus mouse */
  250         int     (*m_probe)(device_t dev, mse_softc_t *sc);
  251                                 /* Probe routine to test for it */
  252         void    (*m_enable)(bus_space_tag_t t, bus_space_handle_t h);
  253                                 /* Start routine */
  254         void    (*m_disable)(bus_space_tag_t t, bus_space_handle_t h);
  255                                 /* Disable interrupts routine */
  256         void    (*m_get)(bus_space_tag_t t, bus_space_handle_t h, int *dx,
  257                     int *dy, int *but);
  258                                 /* and get mouse status */
  259         mousehw_t   m_hw;       /* buttons iftype type model hwid */
  260         mousemode_t m_mode;     /* proto rate res accel level size mask */
  261 } mse_types[] = {
  262         { MSE_ATIINPORT, 
  263           mse_probeati, mse_enableati, mse_disableati, mse_getati,
  264           { 2, MOUSE_IF_INPORT, MOUSE_MOUSE, MOUSE_MODEL_GENERIC, 0, },
  265           { MOUSE_PROTO_INPORT, -1, -1, 0, 0, MOUSE_MSC_PACKETSIZE, 
  266             { MOUSE_MSC_SYNCMASK, MOUSE_MSC_SYNC, }, }, },
  267         { MSE_LOGITECH, 
  268           mse_probelogi, mse_enablelogi, mse_disablelogi, mse_getlogi,
  269           { 2, MOUSE_IF_BUS, MOUSE_MOUSE, MOUSE_MODEL_GENERIC, 0, },
  270           { MOUSE_PROTO_BUS, -1, -1, 0, 0, MOUSE_MSC_PACKETSIZE, 
  271             { MOUSE_MSC_SYNCMASK, MOUSE_MSC_SYNC, }, }, },
  272         { 0, },
  273 };
  274 
  275 static  int
  276 mse_probe(dev)
  277         device_t dev;
  278 {
  279         mse_softc_t *sc;
  280         int error;
  281         int rid;
  282         int i;
  283 
  284         /* check PnP IDs */
  285         error = ISA_PNP_PROBE(device_get_parent(dev), dev, mse_ids);
  286         if (error == ENXIO)
  287                 return error;
  288 
  289         sc = device_get_softc(dev);
  290         rid = 0;
  291         sc->sc_port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
  292                                          MSE_IOSIZE, RF_ACTIVE);
  293         if (sc->sc_port == NULL)
  294                 return ENXIO;
  295         sc->sc_iot = rman_get_bustag(sc->sc_port);
  296         sc->sc_ioh = rman_get_bushandle(sc->sc_port);
  297 
  298         /*
  299          * Check for each mouse type in the table.
  300          */
  301         i = 0;
  302         while (mse_types[i].m_type) {
  303                 if ((*mse_types[i].m_probe)(dev, sc)) {
  304                         sc->sc_mousetype = mse_types[i].m_type;
  305                         sc->sc_enablemouse = mse_types[i].m_enable;
  306                         sc->sc_disablemouse = mse_types[i].m_disable;
  307                         sc->sc_getmouse = mse_types[i].m_get;
  308                         sc->hw = mse_types[i].m_hw;
  309                         sc->mode = mse_types[i].m_mode;
  310                         bus_release_resource(dev, SYS_RES_IOPORT, rid,
  311                                              sc->sc_port);
  312                         device_set_desc(dev, "Bus/InPort Mouse");
  313                         return 0;
  314                 }
  315                 i++;
  316         }
  317         bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_port);
  318         return ENXIO;
  319 }
  320 
  321 static  int
  322 mse_attach(dev)
  323         device_t dev;
  324 {
  325         mse_softc_t *sc;
  326         int flags;
  327         int unit;
  328         int rid;
  329 
  330         sc = device_get_softc(dev);
  331         unit = device_get_unit(dev);
  332 
  333         rid = 0;
  334         sc->sc_port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
  335                                          MSE_IOSIZE, RF_ACTIVE);
  336         if (sc->sc_port == NULL)
  337                 return ENXIO;
  338         sc->sc_intr = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
  339                                          RF_ACTIVE);
  340         if (sc->sc_intr == NULL) {
  341                 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_port);
  342                 return ENXIO;
  343         }
  344         sc->sc_iot = rman_get_bustag(sc->sc_port);
  345         sc->sc_ioh = rman_get_bushandle(sc->sc_port);
  346 
  347         if (BUS_SETUP_INTR(device_get_parent(dev), dev, sc->sc_intr,
  348                            INTR_TYPE_TTY, mseintr, sc, &sc->sc_ih)) {
  349                 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_port);
  350                 bus_release_resource(dev, SYS_RES_IRQ, rid, sc->sc_intr);
  351                 return ENXIO;
  352         }
  353 
  354         flags = device_get_flags(dev);
  355         sc->mode.accelfactor = (flags & MSE_CONFIG_ACCEL) >> 4;
  356         callout_handle_init(&sc->sc_callout);
  357 
  358         sc->sc_dev = make_dev(&mse_cdevsw, unit << 1, 0, 0, 0600,
  359                               "mse%d", unit);
  360         sc->sc_ndev = make_dev(&mse_cdevsw, (unit<<1)+1, 0, 0, 0600,
  361                                "nmse%d", unit);
  362 
  363         return 0;
  364 }
  365 
  366 static  int
  367 mse_detach(dev)
  368         device_t dev;
  369 {
  370         mse_softc_t *sc;
  371         int rid;
  372 
  373         sc = device_get_softc(dev);
  374         if (sc->sc_flags & MSESC_OPEN)
  375                 return EBUSY;
  376 
  377         rid = 0;
  378         BUS_TEARDOWN_INTR(device_get_parent(dev), dev, sc->sc_intr, sc->sc_ih);
  379         bus_release_resource(dev, SYS_RES_IRQ, rid, sc->sc_intr);
  380         bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_port);
  381 
  382         destroy_dev(sc->sc_dev);
  383         destroy_dev(sc->sc_ndev);
  384 
  385         return 0;
  386 }
  387 
  388 /*
  389  * Exclusive open the mouse, initialize it and enable interrupts.
  390  */
  391 static  int
  392 mseopen(dev, flags, fmt, td)
  393         dev_t dev;
  394         int flags;
  395         int fmt;
  396         struct thread *td;
  397 {
  398         mse_softc_t *sc;
  399         int s;
  400 
  401         sc = devclass_get_softc(mse_devclass, MSE_UNIT(dev));
  402         if (sc == NULL)
  403                 return (ENXIO);
  404         if (sc->sc_mousetype == MSE_NONE)
  405                 return (ENXIO);
  406         if (sc->sc_flags & MSESC_OPEN)
  407                 return (EBUSY);
  408         sc->sc_flags |= MSESC_OPEN;
  409         sc->sc_obuttons = sc->sc_buttons = MOUSE_MSC_BUTTONS;
  410         sc->sc_deltax = sc->sc_deltay = 0;
  411         sc->sc_bytesread = sc->mode.packetsize = MOUSE_MSC_PACKETSIZE;
  412         sc->sc_watchdog = FALSE;
  413         sc->sc_callout = timeout(msetimeout, dev, hz*2);
  414         sc->mode.level = 0;
  415         sc->status.flags = 0;
  416         sc->status.button = sc->status.obutton = 0;
  417         sc->status.dx = sc->status.dy = sc->status.dz = 0;
  418 
  419         /*
  420          * Initialize mouse interface and enable interrupts.
  421          */
  422         s = spltty();
  423         (*sc->sc_enablemouse)(sc->sc_iot, sc->sc_ioh);
  424         splx(s);
  425         return (0);
  426 }
  427 
  428 /*
  429  * mseclose: just turn off mouse innterrupts.
  430  */
  431 static  int
  432 mseclose(dev, flags, fmt, td)
  433         dev_t dev;
  434         int flags;
  435         int fmt;
  436         struct thread *td;
  437 {
  438         mse_softc_t *sc = devclass_get_softc(mse_devclass, MSE_UNIT(dev));
  439         int s;
  440 
  441         untimeout(msetimeout, dev, sc->sc_callout);
  442         callout_handle_init(&sc->sc_callout);
  443         s = spltty();
  444         (*sc->sc_disablemouse)(sc->sc_iot, sc->sc_ioh);
  445         sc->sc_flags &= ~MSESC_OPEN;
  446         splx(s);
  447         return(0);
  448 }
  449 
  450 /*
  451  * mseread: return mouse info using the MSC serial protocol, but without
  452  * using bytes 4 and 5.
  453  * (Yes this is cheesy, but it makes the X386 server happy, so...)
  454  */
  455 static  int
  456 mseread(dev, uio, ioflag)
  457         dev_t dev;
  458         struct uio *uio;
  459         int ioflag;
  460 {
  461         mse_softc_t *sc = devclass_get_softc(mse_devclass, MSE_UNIT(dev));
  462         int xfer, s, error;
  463 
  464         /*
  465          * If there are no protocol bytes to be read, set up a new protocol
  466          * packet.
  467          */
  468         s = spltty(); /* XXX Should be its own spl, but where is imlXX() */
  469         if (sc->sc_bytesread >= sc->mode.packetsize) {
  470                 while (sc->sc_deltax == 0 && sc->sc_deltay == 0 &&
  471                        (sc->sc_obuttons ^ sc->sc_buttons) == 0) {
  472                         if (MSE_NBLOCKIO(dev)) {
  473                                 splx(s);
  474                                 return (0);
  475                         }
  476                         sc->sc_flags |= MSESC_WANT;
  477                         error = tsleep((caddr_t)sc, MSEPRI | PCATCH,
  478                                 "mseread", 0);
  479                         if (error) {
  480                                 splx(s);
  481                                 return (error);
  482                         }
  483                 }
  484 
  485                 /*
  486                  * Generate protocol bytes.
  487                  * For some reason X386 expects 5 bytes but never uses
  488                  * the fourth or fifth?
  489                  */
  490                 sc->sc_bytes[0] = sc->mode.syncmask[1] 
  491                     | (sc->sc_buttons & ~sc->mode.syncmask[0]);
  492                 if (sc->sc_deltax > 127)
  493                         sc->sc_deltax = 127;
  494                 if (sc->sc_deltax < -127)
  495                         sc->sc_deltax = -127;
  496                 sc->sc_deltay = -sc->sc_deltay; /* Otherwise mousey goes wrong way */
  497                 if (sc->sc_deltay > 127)
  498                         sc->sc_deltay = 127;
  499                 if (sc->sc_deltay < -127)
  500                         sc->sc_deltay = -127;
  501                 sc->sc_bytes[1] = sc->sc_deltax;
  502                 sc->sc_bytes[2] = sc->sc_deltay;
  503                 sc->sc_bytes[3] = sc->sc_bytes[4] = 0;
  504                 sc->sc_bytes[5] = sc->sc_bytes[6] = 0;
  505                 sc->sc_bytes[7] = MOUSE_SYS_EXTBUTTONS;
  506                 sc->sc_obuttons = sc->sc_buttons;
  507                 sc->sc_deltax = sc->sc_deltay = 0;
  508                 sc->sc_bytesread = 0;
  509         }
  510         splx(s);
  511         xfer = min(uio->uio_resid, sc->mode.packetsize - sc->sc_bytesread);
  512         error = uiomove(&sc->sc_bytes[sc->sc_bytesread], xfer, uio);
  513         if (error)
  514                 return (error);
  515         sc->sc_bytesread += xfer;
  516         return(0);
  517 }
  518 
  519 /*
  520  * mseioctl: process ioctl commands.
  521  */
  522 static int
  523 mseioctl(dev, cmd, addr, flag, td)
  524         dev_t dev;
  525         u_long cmd;
  526         caddr_t addr;
  527         int flag;
  528         struct thread *td;
  529 {
  530         mse_softc_t *sc = devclass_get_softc(mse_devclass, MSE_UNIT(dev));
  531         mousestatus_t status;
  532         int err = 0;
  533         int s;
  534 
  535         switch (cmd) {
  536 
  537         case MOUSE_GETHWINFO:
  538                 s = spltty();
  539                 *(mousehw_t *)addr = sc->hw;
  540                 if (sc->mode.level == 0)
  541                         ((mousehw_t *)addr)->model = MOUSE_MODEL_GENERIC;
  542                 splx(s);
  543                 break;
  544 
  545         case MOUSE_GETMODE:
  546                 s = spltty();
  547                 *(mousemode_t *)addr = sc->mode;
  548                 switch (sc->mode.level) {
  549                 case 0:
  550                         break;
  551                 case 1:
  552                         ((mousemode_t *)addr)->protocol = MOUSE_PROTO_SYSMOUSE;
  553                         ((mousemode_t *)addr)->syncmask[0] = MOUSE_SYS_SYNCMASK;
  554                         ((mousemode_t *)addr)->syncmask[1] = MOUSE_SYS_SYNC;
  555                         break;
  556                 }
  557                 splx(s);
  558                 break;
  559 
  560         case MOUSE_SETMODE:
  561                 switch (((mousemode_t *)addr)->level) {
  562                 case 0:
  563                 case 1:
  564                         break;
  565                 default:
  566                         return (EINVAL);
  567                 }
  568                 if (((mousemode_t *)addr)->accelfactor < -1)
  569                         return (EINVAL);
  570                 else if (((mousemode_t *)addr)->accelfactor >= 0)
  571                         sc->mode.accelfactor = 
  572                             ((mousemode_t *)addr)->accelfactor;
  573                 sc->mode.level = ((mousemode_t *)addr)->level;
  574                 switch (sc->mode.level) {
  575                 case 0:
  576                         sc->sc_bytesread = sc->mode.packetsize 
  577                             = MOUSE_MSC_PACKETSIZE;
  578                         break;
  579                 case 1:
  580                         sc->sc_bytesread = sc->mode.packetsize 
  581                             = MOUSE_SYS_PACKETSIZE;
  582                         break;
  583                 }
  584                 break;
  585 
  586         case MOUSE_GETLEVEL:
  587                 *(int *)addr = sc->mode.level;
  588                 break;
  589 
  590         case MOUSE_SETLEVEL:
  591                 switch (*(int *)addr) {
  592                 case 0:
  593                         sc->mode.level = *(int *)addr;
  594                         sc->sc_bytesread = sc->mode.packetsize 
  595                             = MOUSE_MSC_PACKETSIZE;
  596                         break;
  597                 case 1:
  598                         sc->mode.level = *(int *)addr;
  599                         sc->sc_bytesread = sc->mode.packetsize 
  600                             = MOUSE_SYS_PACKETSIZE;
  601                         break;
  602                 default:
  603                         return (EINVAL);
  604                 }
  605                 break;
  606 
  607         case MOUSE_GETSTATUS:
  608                 s = spltty();
  609                 status = sc->status;
  610                 sc->status.flags = 0;
  611                 sc->status.obutton = sc->status.button;
  612                 sc->status.button = 0;
  613                 sc->status.dx = 0;
  614                 sc->status.dy = 0;
  615                 sc->status.dz = 0;
  616                 splx(s);
  617                 *(mousestatus_t *)addr = status;
  618                 break;
  619 
  620         case MOUSE_READSTATE:
  621         case MOUSE_READDATA:
  622                 return (ENODEV);
  623 
  624 #if (defined(MOUSE_GETVARS))
  625         case MOUSE_GETVARS:
  626         case MOUSE_SETVARS:
  627                 return (ENODEV);
  628 #endif
  629 
  630         default:
  631                 return (ENOTTY);
  632         }
  633         return (err);
  634 }
  635 
  636 /*
  637  * msepoll: check for mouse input to be processed.
  638  */
  639 static  int
  640 msepoll(dev, events, td)
  641         dev_t dev;
  642         int events;
  643         struct thread *td;
  644 {
  645         mse_softc_t *sc = devclass_get_softc(mse_devclass, MSE_UNIT(dev));
  646         int s;
  647         int revents = 0;
  648 
  649         s = spltty();
  650         if (events & (POLLIN | POLLRDNORM)) {
  651                 if (sc->sc_bytesread != sc->mode.packetsize ||
  652                     sc->sc_deltax != 0 || sc->sc_deltay != 0 ||
  653                     (sc->sc_obuttons ^ sc->sc_buttons) != 0)
  654                         revents |= events & (POLLIN | POLLRDNORM);
  655                 else {
  656                         /*
  657                          * Since this is an exclusive open device, any previous
  658                          * proc pointer is trash now, so we can just assign it.
  659                          */
  660                         selrecord(td, &sc->sc_selp);
  661                 }
  662         }
  663         splx(s);
  664         return (revents);
  665 }
  666 
  667 /*
  668  * msetimeout: watchdog timer routine.
  669  */
  670 static void
  671 msetimeout(arg)
  672         void *arg;
  673 {
  674         dev_t dev;
  675         mse_softc_t *sc;
  676 
  677         dev = (dev_t)arg;
  678         sc = devclass_get_softc(mse_devclass, MSE_UNIT(dev));
  679         if (sc->sc_watchdog) {
  680                 if (bootverbose)
  681                         printf("mse%d: lost interrupt?\n", MSE_UNIT(dev));
  682                 mseintr(sc);
  683         }
  684         sc->sc_watchdog = TRUE;
  685         sc->sc_callout = timeout(msetimeout, dev, hz);
  686 }
  687 
  688 /*
  689  * mseintr: update mouse status. sc_deltax and sc_deltay are accumulative.
  690  */
  691 static void
  692 mseintr(arg)
  693         void *arg;
  694 {
  695         /*
  696          * the table to turn MouseSystem button bits (MOUSE_MSC_BUTTON?UP)
  697          * into `mousestatus' button bits (MOUSE_BUTTON?DOWN).
  698          */
  699         static int butmap[8] = {
  700                 0, 
  701                 MOUSE_BUTTON3DOWN, 
  702                 MOUSE_BUTTON2DOWN, 
  703                 MOUSE_BUTTON2DOWN | MOUSE_BUTTON3DOWN, 
  704                 MOUSE_BUTTON1DOWN, 
  705                 MOUSE_BUTTON1DOWN | MOUSE_BUTTON3DOWN, 
  706                 MOUSE_BUTTON1DOWN | MOUSE_BUTTON2DOWN,
  707                 MOUSE_BUTTON1DOWN | MOUSE_BUTTON2DOWN | MOUSE_BUTTON3DOWN
  708         };
  709         mse_softc_t *sc = arg;
  710         int dx, dy, but;
  711         int sign;
  712 
  713 #ifdef DEBUG
  714         static int mse_intrcnt = 0;
  715         if((mse_intrcnt++ % 10000) == 0)
  716                 printf("mseintr\n");
  717 #endif /* DEBUG */
  718         if ((sc->sc_flags & MSESC_OPEN) == 0)
  719                 return;
  720 
  721         (*sc->sc_getmouse)(sc->sc_iot, sc->sc_ioh, &dx, &dy, &but);
  722         if (sc->mode.accelfactor > 0) {
  723                 sign = (dx < 0);
  724                 dx = dx * dx / sc->mode.accelfactor;
  725                 if (dx == 0)
  726                         dx = 1;
  727                 if (sign)
  728                         dx = -dx;
  729                 sign = (dy < 0);
  730                 dy = dy * dy / sc->mode.accelfactor;
  731                 if (dy == 0)
  732                         dy = 1;
  733                 if (sign)
  734                         dy = -dy;
  735         }
  736         sc->sc_deltax += dx;
  737         sc->sc_deltay += dy;
  738         sc->sc_buttons = but;
  739 
  740         but = butmap[~but & MOUSE_MSC_BUTTONS];
  741         sc->status.dx += dx;
  742         sc->status.dy += dy;
  743         sc->status.flags |= ((dx || dy) ? MOUSE_POSCHANGED : 0)
  744             | (sc->status.button ^ but);
  745         sc->status.button = but;
  746 
  747         sc->sc_watchdog = FALSE;
  748 
  749         /*
  750          * If mouse state has changed, wake up anyone wanting to know.
  751          */
  752         if (sc->sc_deltax != 0 || sc->sc_deltay != 0 ||
  753             (sc->sc_obuttons ^ sc->sc_buttons) != 0) {
  754                 if (sc->sc_flags & MSESC_WANT) {
  755                         sc->sc_flags &= ~MSESC_WANT;
  756                         wakeup((caddr_t)sc);
  757                 }
  758                 selwakeup(&sc->sc_selp);
  759         }
  760 }
  761 
  762 /*
  763  * Routines for the Logitech mouse.
  764  */
  765 /*
  766  * Test for a Logitech bus mouse and return 1 if it is.
  767  * (until I know how to use the signature port properly, just disable
  768  *  interrupts and return 1)
  769  */
  770 static int
  771 mse_probelogi(dev, sc)
  772         device_t dev;
  773         mse_softc_t *sc;
  774 {
  775 
  776         int sig;
  777 
  778         bus_space_write_1(sc->sc_iot, sc->sc_ioh, MSE_PORTD, MSE_SETUP);
  779                 /* set the signature port */
  780         bus_space_write_1(sc->sc_iot, sc->sc_ioh, MSE_PORTB, MSE_LOGI_SIG);
  781 
  782         DELAY(30000); /* 30 ms delay */
  783         sig = bus_space_read_1(sc->sc_iot, sc->sc_ioh, MSE_PORTB) & 0xFF;
  784         if (sig == MSE_LOGI_SIG) {
  785                 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MSE_PORTC,
  786                                   MSE_DISINTR);
  787                 return(1);
  788         } else {
  789                 if (bootverbose)
  790                         device_printf(dev, "wrong signature %x\n", sig);
  791                 return(0);
  792         }
  793 }
  794 
  795 /*
  796  * Initialize Logitech mouse and enable interrupts.
  797  */
  798 static void
  799 mse_enablelogi(tag, handle)
  800         bus_space_tag_t tag;
  801         bus_space_handle_t handle;
  802 {
  803         int dx, dy, but;
  804 
  805         bus_space_write_1(tag, handle, MSE_PORTD, MSE_SETUP);
  806         mse_getlogi(tag, handle, &dx, &dy, &but);
  807 }
  808 
  809 /*
  810  * Disable interrupts for Logitech mouse.
  811  */
  812 static void
  813 mse_disablelogi(tag, handle)
  814         bus_space_tag_t tag;
  815         bus_space_handle_t handle;
  816 {
  817 
  818         bus_space_write_1(tag, handle, MSE_PORTC, MSE_DISINTR);
  819 }
  820 
  821 /*
  822  * Get the current dx, dy and button up/down state.
  823  */
  824 static void
  825 mse_getlogi(tag, handle, dx, dy, but)
  826         bus_space_tag_t tag;
  827         bus_space_handle_t handle;
  828         int *dx;
  829         int *dy;
  830         int *but;
  831 {
  832         register char x, y;
  833 
  834         bus_space_write_1(tag, handle, MSE_PORTC, MSE_HOLD | MSE_RXLOW);
  835         x = bus_space_read_1(tag, handle, MSE_PORTA);
  836         *but = (x >> 5) & MOUSE_MSC_BUTTONS;
  837         x &= 0xf;
  838         bus_space_write_1(tag, handle, MSE_PORTC, MSE_HOLD | MSE_RXHIGH);
  839         x |= (bus_space_read_1(tag, handle, MSE_PORTA) << 4);
  840         bus_space_write_1(tag, handle, MSE_PORTC, MSE_HOLD | MSE_RYLOW);
  841         y = (bus_space_read_1(tag, handle, MSE_PORTA) & 0xf);
  842         bus_space_write_1(tag, handle, MSE_PORTC, MSE_HOLD | MSE_RYHIGH);
  843         y |= (bus_space_read_1(tag, handle, MSE_PORTA) << 4);
  844         *dx = x;
  845         *dy = y;
  846         bus_space_write_1(tag, handle, MSE_PORTC, MSE_INTREN);
  847 }
  848 
  849 /*
  850  * Routines for the ATI Inport bus mouse.
  851  */
  852 /*
  853  * Test for a ATI Inport bus mouse and return 1 if it is.
  854  * (do not enable interrupts)
  855  */
  856 static int
  857 mse_probeati(dev, sc)
  858         device_t dev;
  859         mse_softc_t *sc;
  860 {
  861         int i;
  862 
  863         for (i = 0; i < 2; i++)
  864                 if (bus_space_read_1(sc->sc_iot, sc->sc_ioh, MSE_PORTC) == 0xde)
  865                         return (1);
  866         return (0);
  867 }
  868 
  869 /*
  870  * Initialize ATI Inport mouse and enable interrupts.
  871  */
  872 static void
  873 mse_enableati(tag, handle)
  874         bus_space_tag_t tag;
  875         bus_space_handle_t handle;
  876 {
  877 
  878         bus_space_write_1(tag, handle, MSE_PORTA, MSE_INPORT_RESET);
  879         bus_space_write_1(tag, handle, MSE_PORTA, MSE_INPORT_MODE);
  880         bus_space_write_1(tag, handle, MSE_PORTB, MSE_INPORT_INTREN);
  881 }
  882 
  883 /*
  884  * Disable interrupts for ATI Inport mouse.
  885  */
  886 static void
  887 mse_disableati(tag, handle)
  888         bus_space_tag_t tag;
  889         bus_space_handle_t handle;
  890 {
  891 
  892         bus_space_write_1(tag, handle, MSE_PORTA, MSE_INPORT_MODE);
  893         bus_space_write_1(tag, handle, MSE_PORTB, 0);
  894 }
  895 
  896 /*
  897  * Get current dx, dy and up/down button state.
  898  */
  899 static void
  900 mse_getati(tag, handle, dx, dy, but)
  901         bus_space_tag_t tag;
  902         bus_space_handle_t handle;
  903         int *dx;
  904         int *dy;
  905         int *but;
  906 {
  907         register char byte;
  908 
  909         bus_space_write_1(tag, handle, MSE_PORTA, MSE_INPORT_MODE);
  910         bus_space_write_1(tag, handle, MSE_PORTB, MSE_INPORT_HOLD);
  911         bus_space_write_1(tag, handle, MSE_PORTA, MSE_INPORT_STATUS);
  912         *but = ~bus_space_read_1(tag, handle, MSE_PORTB) & MOUSE_MSC_BUTTONS;
  913         bus_space_write_1(tag, handle, MSE_PORTA, MSE_INPORT_DX);
  914         byte = bus_space_read_1(tag, handle, MSE_PORTB);
  915         *dx = byte;
  916         bus_space_write_1(tag, handle, MSE_PORTA, MSE_INPORT_DY);
  917         byte = bus_space_read_1(tag, handle, MSE_PORTB);
  918         *dy = byte;
  919         bus_space_write_1(tag, handle, MSE_PORTA, MSE_INPORT_MODE);
  920         bus_space_write_1(tag, handle, MSE_PORTB, MSE_INPORT_INTREN);
  921 }

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